Gas burner



May 6, 1952 c. A. WESEMAN GAS BURNER 2 SHEETS-SHEET 1 Filed Oct. 7, 1948 y 1952 c. A. WESEMAN 2,595,739

GAS BURNER Filed Oct. 7. 1948 2 SHEETSSHEET 2 Patented May 6, 1952 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to gas burners which are particularly adaptable for use as conversion units for heating furnaces and the like.

It is an object of the invention to provide a gas burner wherein the-secondary air supply is introduced to a mixture of primary air and fuel gas in such a way that there is an efficient mixture of the gas and air topromote proper combustion.

Another object of the invention is to provide improved pilot flame structure in association with th burner.

The above and other objects and advantages of the invention will more fully appear from the following description made in connection with the accompanying drawings, wherein like reference characters refer to the same parts throughout the views, and, in which:

Figure 1 is a vertical sectional view through the lower portion of a furnace equipped with the burner;

Figure 2 is a fragmentary sectional view taken approximately on the line 2-2 of Figure 1;

Figure 3 is an enlarged plan view of the gasv and air outlet unit with the deflecting bailie removed;

Figure 4 is a side elevational view of the structure shown in Figure 3;

Figure 5 is a longitudinal vertical sectional view taken approximately on the line 5-5 of Figure 3;

Figure 6 is an enlarged fragmentary sectional view taken approximately on the line 6--6 of Figure 3;

Figure 7 is a plan view of a modified shape of burner unit with half of the baffie or deflector member cut away;

Figure 8 is a view of the structurein Figure 1, partially in side elevation and partially in vertical section;

Figure 9 is a plan view of another form of defiector member;

Figure 10 is a side elevational view, with a cor-s ner broken away, of the structure in Figure 9; and Figure 11 is an end elevational view of the same structure with a corner broken away.

In Figure 1 there is shown a furnaceiz having a side wall I3.

Supported by the inner face of the side wall I3 is an angle iron M which in turn supports a sheet metal partition member 5. Upon this sheet is a partition member 5 of some suitable fire-proof material.

Extending inwardly from a side wall I3 of the furnace I2 is a Venturi pipe ll which is adapted to convey a mixture of primary air and a gaseous fuel. A gas supply jet I8 is shown extendin into the entrance end of the Venturi tube 11. Legs E9 on the tube I! are adapted to support the right-hand end of said tube which is turned upwardly and provided with a threaded portion 20.

Supported on the threaded portion is a bowl 2 i, said bowl being connected to the Venturi pipe by an internally threaded connecting member 22, which as shown in Figures 2 and 3, is placed in an-off-center position. This permits the bowl to be rotated so that the connecting member 22 will register with the threaded end 20 of the Venturi tube, thereby providing adjustment for furnaces of different diameters. For a furnace of larger diameter than that shown the bowl 2| would be turned to bring the connecting element to a point between the center of the furnace and the left-hand end of the Venturi tube ll. Obviously, for a smaller sized furnace the bowl would be turned in the other direction.

A plurality of spanning members 23 extend radially outwardly from the bowl 2| and support a ring 24 which includes a horizontal portion 25 and an upstanding wall 26. The wall 26 is outwardly concentric to the upper edge of the bowl 2|. The upstanding wall 26 is adapted to extend through a central aperture in the partition made up of. the plates l5 and IE5 and the partition is adapted to rest upon the horizontal ring 25. A vertical ring portion 26 is shown extending slightly above the upper partition member |6. This is best illustrated in Figure 6.

The space between the upper portion of the bowl 2 I" and the vertical ring portion 26 provides a secondary air flow passage H.

A combined baflie and deflector member 28 is shown resting in the upper portion of the bowl 2 l'. The member 28 is dish-shaped as shown and includes a bottom 29, an upwardly and outwardly slanting side wall 39 and an upwardly outwardly extending horizontal flange 3|. The baflle and deflector member 28 has lugs 32 thereon which rest upon the upper edge of the bowl 2| and said lugs have lower reduced portions 33 which fit into an inner tapered portion 34 at the upper edge of the bowl. The reduced lugs or spacers 33 center the deflector member 28 in the upper portion of the bowl and provide a narrow passage which constitutes an outlet for mixed primary air and gas from the interior of the bowl 2| to the bottom of a combustion chamber 35 above the partition member [6.

It should be noted that the secondary air passage 2'! is located beneath the upper horizontal flange 3| on the deflector 28 and it is preferred that the outer edge of said flange 3| extend laterally outwardly a short distance beyond the secondary air inlet 27.

A ring 24 is provided with an off-set portion 36 defining an open area 31 through which a pilot tube 38 extends, the pilot tube terminating approximately at the upper side of the partition member [6 and being disposed outside of the generally circular secondary air outlet passage 21.

As stated above primary air and gas are admitted to the Venturi tube I! in the usual manner, gas entering through the jet [8 and primary air entering an opening 39 in the right hand end of the tube 1 I. This mixture of primary air and gas passes into the bowl 2| and then out of the bowl between its inner upper edge and the outer face of the slanting side wall 30 of the deflector 28. The primary air and gas mixture then strikes the upper horizontal flange 3| on the deflector 28 and is spread laterally outwardly. Secondary air enters from below the partition members l5 and I6 through the circular passage 2! around the upper edge of the bowl 2!. The upward and then outward flow of primary air and gas causes laterally outward deflection of the secondary air. As the secondary air strikes the primary air and gas mixture it is partially mixed with such mixture to the extent that some combustion takes place.

Air and gases which spread out from the center of the burner cause combustion in a radially outward direction and burn not only fuel gas and secondary air but also consume air adjacent the partition l6 and in spite of the heat which normally tends to expand the gases and air, a reduced pressure is set up beneath the outwardly directed gaseous fuel mixture. Furthermore, there is a tendency for the fuel gas and secondary air to become mixed for proper combustion where these two outwardly directed layers come together. This combustion stratum is relatively close to the partition and assists in consuming the air adjacent the partition and further reduces the pressure at that point. Consequently the burning gaseous mixture is held down toward the partition as it is directed radially outwardly so that the flame will spread rather than be centered in the combustion chamber.

There is also some negative pressure created by the flow of secondary air radially outwardly past the upper edge of the vertical ring portion 26 which is disposed slightly above the upper surface of the partition [6.

While there is a delayed combustion of some of the fuel mixture it should be understood that there is an ample secondary air supply to support practically complete combustion of the gaseous fuel. Furthermore it should be understood that that portion of the secondary air and primary air and gas mixture which is carried outwardly a considerable distance, is in the combustion chamber a long enough period of time to become preheated and consequently insure complete com-.

bustion.

The location of the outlet end of the pilot supply tube 38 has been described above. It should be noted that it lies just outside of the substantially circular secondary air passage 31. The pilot tube has its outlet end directed upwardly so that flow from the tube can readily penetrate the lower layer of secondary air and reach the primary air and gas layer above so that ignition of the gaseous fuel is not delayed.

In Figures 7 and 8 I have shown a structure which is essentially the same as that shown in Figures 1 through 6 insofar as its functional structure is concerned. However, the shape of the bowl and deflector member are different. There is illustrated a bowl 40 having a threaded connector portion 4| which is adapted to be secured to the outlet of the Venturi tube. The bowl supports an outwardly disposed ring 42 defining a secondary air passage 43 and on the bowl is supported a bafille and deflector member 44 in the same manner a in the preceding embodiment. The bowl 40 and deflector member 44 as well as the ring unit 42 surrounding the bowl are generally rectangular in shape. Such a shape may be used for convenience in casting if desired. Other than the rectangular shape the structure in Figures 7 and 8 is exactly the same as that shown in Figures 1 through 8.

In Figures 9, 10 and 11 is shown a deflector member 45 which includes a flat bottom 66 and a side wall 4'! having a more nearl vertical lower outer wall portion 48 and a more slanted upper outer wall portion 49. Small outwardly disposed lugs 50 are adapted to flt into the tapered upper portion of a bowl such as the bowl 4% of Figure 8. The deflector 45 is not provided with a horizontal upper flange such as the flange 44a in Figures '7 and 8 but it will be seen that primary air and gas will still be deflected outwardly as well as directed generally upwardly.

The deflector 45 is shown rectangular in shape but of course it could be made substantially round to fit in a bowl such as the round bowl 24 of Figures 1 through 6.

From the foregoing description it will be seen that I have provided a fuel burner which is adapt- 0 tion chamber. The spreading of the gases as they ignite furthermore permits preheating of the fuel gases including the secondary air and insures more complete combustion of the gases.

As pointed out above the apparatus can be readily installed in furnaces of different sizes and adjusted to fit the different diameters by rotatably shifting the bowl to the inlet end of the Venturi tube.

It will of course be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of my invention.

What I claim is:

1. A gaseous fuel burner comprisingan open topped bowl, means for supplying mixed primary combustion air and gaseous fuel to said bowl, a battle and deflector member nesting within the upper portion of said bowl, spacers holding the lower portion of said member in spaced relation from the upper inner portion of said bowl to define an upwardly extending mix-ed fuel outlet at the inner upper portion of said bowl, said bafile and deflecting member having an outer surface projecting upwardly and outwardly from said mixed fuel outlet, and said bafiie and deflecting member having in spaced relation above said outlet an outturned deflecting flange and a secondary air supply means surrounding said bowl and spaced outwardly beyond said mixed fuel outlet and located below said deflecting flange within the confines thereof and discharging upwardly below said flange.

2. The structure defined in claim 1, a partition having a central opening through which said bowl and secondary air supply means project and the discharge of said secondary air supply means being located above the level of said partition.

3. A gaseous fuel burner comprising an open topped bowl, means for supplying mixed primary combustion air and gaseous fuel to said bowl, a bafiie and deflector member nesting Within the upper portion of said bowl, spacers holding the lower portion of said member in spaced relation from the upper inner portion of said bowl to define an upwardly extending mixed fuel outlet at the inner upper portion of said bowl, said bafiie and deflecting member having an outer surface projecting upwardly and outwardly from said mixed fuel outlet and a secondary air supply means surrounding said bowl and spaced outwardly below said mixed fuel outlet and located below and at least partially within the confines of the upper portion of the outer surface of said bafiie and deflecting member.

CHESTER A. WESEMAN.

6 REFERENiJES CITED The following references are of record in the file of this patent:

UNITED STATES PATENT Number Name Date 786,647 Jones Apr. 4, 1905 1,498,342 Blanchard June 17, 1924 1,735,618 ODowcl Nov. 12, 1929 1,878,427 Ronstrom Sept. 20, 1932 2,011,283 Huff Aug. 13, 1935 2,925,939 Bulger Dec. 24, 1935 2,113,091 Scott Apr. 5, 1938 2,183,836 Gordon Dec. 19, 1939 2,348,767 Walker et a1 May 16, 1944 2,372,953 Hurlburt et al Apr. 3, 1945 2,424,154 Dunham et a1 July 15, 1947 2,475,240 Hassmer et a1 July 5, 1949 2,497,321 Pattinscn et a1 Feb. 14, 1950 2,499,707 Warren Mar. 7, 1950 FOREIGN PATENTS Number Country Date 444,944 France Aug. 21, 1912 531,738 Germany Aug. 14, 1931 156,882 Australia Sept. 11, 1939 

